"You cannot respond to a meeting without an organizer. You must add an organizer field to the item."

Question

I'm working on resolving an issue for a user that needs to reschedule appointments in 3 Conference Rooms when needed.
The user will open the meeting request and hit 'decline' and then attempt to edit the response before sending it back but then the appointment closes and the following message appears:
"You cannot respond to a meeting without an organizer. You must add an organizer field to the item. "
-End User has Full Mailbox Access
-Listed as a 'Owner' of the Calendar
-Delegate Rights granted to the Calendar as well
-Not in Cached Mode
Check Office updates and Office is up to date on patches.
User does not have a blackberry device.
Not sure of what else to do...I have researched this topic and all the items I have tried have not worked.
The Test Meeting I created to reproduce the errors was done through Outlook and adding the conference room as a resource and the user getting the errors as someone required.
I changed the calendar view to "Active Appointments". Right click on the column headings to add a field. In the field choser, pick All appt fields. Scroll down and drag n drop the Organizer field on the fieldbar.
The Organizer (From Field) is showing the end users who scheduled the meetings.
My Test Meeting Request that I had scheduled for last week that re-produced the error message was moved to today.
It is showing me as the Organizer.
Had the user who manages the Resource try again to cancel or edit the meeting and again receive the same message.

Answer 1

Hi,
I suggest you check related meeting in Calendar folder by using MFCMapi:
Note: The meeting should be added to Calendar folder as tentatively accepted if you open the meeting request (but takes no action) or sniffer processes the meeting request.
1. Download MFCMapi tool from here:
http://www.microsoft.com/downloads/details.aspx?displaylang=en&FamilyID=55fdffd7-1878-4637-9808-1e21abb3ae37
2. Configure Outlook Profile (Online Mode) for the Conference Rooms
3. Logon the Mailbox of the Conference Room by using credential of the End User.
4. Open the Calendar Folder, locate the problem Meeting
5. Right click the meeting entry and click Disable Recipient Table
6. You should be able to get both the organizer and the attendees
7. In addition, the PR_Recipient_Flags of the organizer should be 3 while the attendees are 1
Mike